Welcome to Australia's only Vintage Radio and Television discussion forums. You are not logged in. Please log in below, apply for an account or retrieve your password.
Australian Vintage Radio Forums
  Home  ·  About Us  ·  Discussion Forums  ·  Glossary  ·  Outside Links  ·  Policies  ·  Services Directory  ·  Safety Warnings  ·  Tutorials

Tech Talk

Forum home - Go back to Tech talk

 Stromberg Carlson Model 4a17
« Back · 1 · Next »
 Return to top of page · Post #: 1 · Written at 4:31:44 PM on 29 August 2023.
Bowler's Gravatar
 Bowler
 Location: Bongaree, QLD
 Member since 26 October 2018
 Member #: 2308
 Postcount: 79

Hi All, does anyone have a circuit diagram for a 4a17 using the 6sa8 as converter. bowler
 
 Return to top of page · Post #: 2 · Written at 8:15:52 PM on 29 August 2023.
Ian Robertson's Gravatar
 Ian Robertson
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 2372

I assume you mean the 6SA7?

https://frank.pocnet.net/sheets/201/6/6SA7.pdf
 
 Return to top of page · Post #: 3 · Written at 10:18:55 PM on 29 August 2023.
Marcc's avatar
 Marcc
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 5257

4A17 is a reflexed set 1947 horrid 6A8, EBF35 metalised Philips, 6V6 and rectifier 5Y3. Use 600v filter caps.
Do not remove the Philips tube by dragging it out by the envelope; The metallisation is its shield and you are liable to break the wire to pin 1 ground.


 
 Return to top of page · Post #: 4 · Written at 9:01:19 AM on 30 August 2023.
Bowler's Gravatar
 Bowler
 Location: Bongaree, QLD
 Member since 26 October 2018
 Member #: 2308
 Postcount: 79

Sorry my mistake the valve is indeed a 6sa7. Bowler
 
 Return to top of page · Post #: 5 · Written at 9:22:08 PM on 31 August 2023.
Ian Robertson's Gravatar
 Ian Robertson
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 2372

The 6SA7 was probably a substitute due to immediate post-war shortages.
It is the same as a 6A8 except the G3 connection is on the base.
The link will give you the pinouts, otherwise the circuit is probably the same as with the 6A8

Marc is right about those metalised Philips valves. Don't pull or twist the red bulb!!
It someone else has, you can fix the connection with a silver or gold paint pen.
 
« Back · 1 · Next »
 You need to be a member to post comments on this forum.

Sign In

Username:
Password:
 Keep me logged in.
Do not tick box on a computer with public access.

Vintage Radio and Television is proudly brought to you by an era where things were built with pride and made to last.

DISCLAIMER: Valve radios and televisions contain voltages that can deliver lethal shocks. You should not attempt to work on a valve radio or other electrical appliances unless you know exactly what you are doing and have gained some experience with electronics and working around high voltages. The owner, administrators and staff of Vintage Radio & Television will accept no liability for any damage, injury or loss of life that comes as a result of your use or mis-use of information on this website. Please read our Safety Warning before using this website.

WARNING: Under no circumstances should you ever apply power to a vintage radio, television or other electrical appliance you have acquired without first having it checked and serviced by an experienced person. Also, at no time should any appliance be connected to an electricity supply if the power cord is damaged. If in doubt, do not apply power.

Shintara - Keepin' It Real · VileSilencer - Maintain The Rage